Stop-motion for looms.



TQBOUCHARD,L V.CUNNHT & P.JONCA&

STOP MOTION FOR LOOMS.

APPLICATION FILED JAN.9. I915.

' 1,150,493. Patented Aug. 17,1915.

cou' txm FLANOGRAPH C0..wAsmNuToN nnrrnn snares; rn'rnnr ornron TIMOTHY ,BOUCHARD, JOHN V. CUNNIFF, A1 lZD -I I IILIZE JONGAS, 0F FALL RIVER, MASSACHUSETTS.

STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

:Patented Aug. 1?, 1915.

ToaZZ whom itmag concern Be it known that we, TrMornY'BoUoHAnp, JOHN V. CUN'NIFF a Ild PHILIP JONGAS, c1t1- zone of the United States, residingat F all River, in thecounty of Bristol andState of Massachusetts, have'invented anew and useful Improvement in Stop -Motions for Looms, of whichthe following is a specification.

This invention relates to certainnew and useful improvements in stop motions for looms, and the primary obj ect of: the invention isto eflect stoppage of the 100111 by and upon tightening of one or more of the warp threads.

A further object of the invention is to provide means of simple and economical structure for accomplishing the purpose set forth, which means is also positive and certain in its action.

A still further object of the invention is to provide means of the type indicated which can be attached to any ordinary loom easily and quickly and without alteration of the loom structure, and inadditionto provide a stop motion which cooperates with the vibrator and the knock off of the loom to stop the loom and lock the stop motion.

In the drawings Figure l is a fragmentary View of a loom shown in side elevation and partly in section. Figs. 2 and 3 are similar enlarged detail views showlng the present invention in normal and stopp ng position. Fig. at is a-detail perspective VIEW showing the normal position of the rod which traverses the warp threads and normally maintains same depressed.

In carrying the invention into practice it is used in connection with a vibrator 1 that is commonly employed in connection with the stop motion of a loom for eifecting stoppage of the loom upon thread breakage. A rod 3 extends transversely and entirely across the back of the loom, and normally holds the warp threads W in a slightly depressed position, as depicted in Fig. 2, and is carried by the vertically reciprocating arms 4, that are provided with rack teeth 5. The arms 4 are slidable in guides 12 formed upon standards 11, while the rod 3 is secured in the lower end of the arms 4 and has its ends preferably received in guide slots 10 formed in a pair of standards 11 which latter are appropriately secured to each side frame of the loom. A pawl 6 is appropriately pivoted to each of the standards 11 and are held against downward movement byengagement with the arms 4:. The upper ends of the standards 11 have levers 7 pivoted thereto intermediate the ends of the levers, the lever ends being pivoted to the drop wires'or members -8 and the arms lso that the arms and drop wires will move in opposite directions when upward movement is given the armset and the drop wires 8 which move in the guides or troughs formed by the two plates 2 and located either as in Fig. l or as in Figs. 2 and 3 will be lowered to come in contact with the vibratorl.

Normally the parts occupy the position shown in Fig. 2. Should one or more of the Warp threads be tightened, it will be apparent that rod 3 will be raised to the position shown in Fig. 3, thereby raising the arms 4 and lowering the drop wires 8 to a position where the drop wires extend across the path of the vibrator 1 as depicted in Fig. 3, which :thus arrests the normal action ofthe vibrator andcauses the action of the stop motion to :knock olf or stop the loom. The pawl 6 will upon raisingof the arms l engage the rack teeth 5 and lock the arms in raised position.

When a Warp thread breaks forward or backwardof the harnesses and gets entangled with other unbroken threads, it prevents sthe dropping of drop wires which would operate the regular stop motion and the :loom will weave what is .commonly called over or under shot work which is de fective cloth. When a thread breaks as above described the entanglement causes one or more of the warp threads to become tight which, acting on the rod 3, will cause the operation of the above described stop motion and cause the stopping of the loom.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. In a loom stop motion, in combination with the vibrator and drop member, standards secured at opposite sides of the loom and having slots therein, a rod engaged on top of the warp threads and having its ends projecting in said slots, vertical arms slidingly carried by the standards and connected to the rod and having rack teeth, pawls pivoted to the standards and engaged with the arms, and a lever pivoted intermediate its length to one of the standards and pivoted at its ends to the drop member and to one of the arms.

2-. In a stop motion for looms, in combination with the vibrator and drop member, means engaging on top of the warp threads for holding same depressed, means for supporting the first means, means for locking the supporting means against downward movement upon raising of the supporting means, and means between the supporting means and drop member for moving the drop member into the path of the vibrator when the first named means is raised by the tightening of the warp threads.

3. In a loom in combination with the drop member and a vibrator, vertically movable means resting upon the warp threads and connected to the drop member whereby upon tightening of the threads said means will be raised and the drop member will be moved into the path of the vibrator to stop the latter.

4. In combination with a loom and the stop motion thereof, and means to engage the latter, vertically movable means engaged with the warp threads and operable upwardly upon tightening thereof and connected to the stop motion engaging means for actuating the stop motion.

5. In combination with a stop motion of a loom, vertically movable means engaged with the warp threads and operable upwardly upon tightening thereof for actuating the stop motion, and means for positively locking the first named means upon operation thereof by the threads.

6. In combination with the vibrator ofa loom and the drop member, a rod adapted to engage on top of the warp threads, vertically movable arms connected to the rod,

means connecting the arms to the drop member whereby upon raising of the arms G'opies of this patent may be obtained for the drop member will be moved into the path of movement of the vibrator, and means to lock the arms in raised position upon actuation thereof by tightening of the threads.

7. In combination with the vibrator and drop member of a loom, a vertically and upwardly movable device operable byv tightening of the threads and connected to the drop member for moving the latter into the path oftravel of the vibrator, and means for effecting locking of said device to hold same in up position upon actuation thereof by the threads.

8. In comb'nation with a loom and the stop motion thereof, means resting upon the warp threads and movable upwardly upon tightening of the latter means connected to the first means for contact with the stop motion upon upward movement of the first means, said first means having rack teeth associated therewith, and a pawl engageable with the rack teeth upon upward movement of said means incident to tightening of the threads to lock said means against downward movement.

9. In combination with a loom and the stop motion thereof, an upwardly movable member resting upon the warp threads, a pivoted element connected at one end to said member, and means pivoted to the opposite end of said element and operable thereby to actuate the stop motion.

In testimony whereof we have signed our names to this specification in the presence of two. subscribing witnesses.

. TIMOTHY BOUCHARD.

JOHN V. CUNNIFF.

, PHILIP J ONGAS.

Witnesses: Y

' ADA E. HAGERTY, I J. A. MILLER.

five cents each, by addressing the Commissioner of Patents. Washington, D. G. I 

